fitbit alter

1: Add a field to the tableAlter table [table name] add [column name] Type2: Delete FieldAlter table [table name] Drop column [column name]3: Modify the field type in the table (you can modify the type of the column, whether it is empty)ALTER TABLE [table name] ALTER COLUMN [column name] Type4: Add primary keyAlter table [table name] add constraint [constraint name] primary KEY ([column name])5: Add UNIQUE

,hidden_column3--From User_tab_cols4--where table_name= ' Cb_batch_flow ' and column_name= ' Bfl_oprno '5 6--Description: Modify the steps:7--(1Query the User_tab_cols table first. The column's virtual column data_default the field information, taking the hash value8--(2) if (1) to find the hash value, you need to perform EXEC delete the column of the virtual column operation, if you do not find the hash value, you do not need to delete the virtual column9--(3After you delete a virtual column,

SQL revocation indexes, tables, and databasesBy using the drop statement, you can easily delete indexes, tables, and databasesSQL DROP INDEXTo delete an index in a table by using the DROP INDEX commandSyntax for Microsoft Sqljet (and Microsoft Access)DROP INDEX index_name on table_nameSyntax for MS SQL ServerDROP INDEX Table_name.index_nameSyntax for IBM DB2 and OracleDROP INDEX index_nameSyntax for MySQLALTER TABLE table_name DROP INDEX index_name　　SQL DROP TABLEDROP TABLE statements are used t

Create a table as defined in the target table;Add a constraint to the table to ensure that the table data is in the target partition;Alter table source table switch to target table partition NumberThe partition number can be obtained through $ partition. partion_func (column value ).This process is much faster than insert select because I/O is not involved. You only need to modify the metadata and the onwer of the partition side.However, the above pro

Oracel ALTER TABLE adds a primary key to the table primary key Sql>Sql> CREATE TABLE EMP (empno number (4) is not NULL,2 ename varchar2 (10),3 Job Varchar2 (9),4 Mgr Number (4),5 HireDate Date,6 Sal Number (7, 2),7 Comm Number (7, 2),8 Deptno Number (2)); Table created. Sql>sql> INSERT INTO EMP values (7369, ' Smith ', ' clerk ', 7902, to_date (' 17-dec-1980 ', ' dd-mon-yyyy '), 20; 1 row created. sql> INSERT INTO EMP values (7499, ' Allen

President 17-nov-81 5000 107844 Turner salesman 7698 08-sep-81 1500 0 307876 Adams Clerk 7788 12-jan-83 1100 20 empno ename Job Mgr HireDate Sal Comm Deptno---------- ---------- --------- ---------- --------- ---------- ---------- ----------7900 James Clerk 7698 03-dec-81 950 307902 Ford analyst 7566 03-dec-81 3000 207934 Miller Clerk 7782 23-jan-82 1300 10 Rows selected. Sql>sql> ALTER TABLE EMP2 Add (3 gender varchar (10)); Table Altered.

MySQL Tutorial PHP tutorial dynamically add Column ALTER table to tableAdd the MySQL statement of the column asALTER TABLE tablename ADD COLUMN columnName varchar () NOT NULL*/Database Tutorial Connection method$db = ' 111cnNet ';$conn = mysql_pconnect (' localhost ', ' root ', ' root ') or Die (Mysql_error ());mysql_select_db ($db, $conn);Start adding column programs/*OK, look at the table structure of the Insert listID Int (8) No auto_incrementTitle

Looking at PD, double-click a table, view its preview label, and then find the CREATE statement for a table, as follows: Copy Code code as follows: CREATE TABLE Company_info ( company_id NVARCHAR2 (m) not NULL, area_id NVARCHAR2 (50), mem_id NVARCHAR2 (50), level_id NVARCHAR2 (50), Name NVARCHAR2 NOT NULL, Capital NVARCHAR2 (50), Unit_property Number (2) is not NULL, Economics_type Number (2) is not NULL, Man_scale number (10,0), License_code NVARCHAR2 (50), License_img N

The following error is reported when I try to modify the primary key of the MySQL data table with Navicat to automatically grow1602 ALTER TABLE causes auto_increment resequencing, resulting in duplicate entry ' 1′for key ' PRIMARY 'Workaround:1th Step: Change the value of the primary key field to 0 for any number that is greater than 0 and does not repeat2nd Step: Modify the primary key field Auto_increment3rd Step: Restore the value of the record tha

--Create a User Yong2,yong2 table space for users, a temporary tablespace of temp,users tablespace size of 10M, the password immediately expires, the user locked.CREATE USER Yong2Identified by QwerDEFAULT tablespace UsersTemporary Tablespace TempQUOTA 10m on usersPASSWORD EXPIREAccount LOCK;--Modify the yong2 password to inspur123 and unlock the user.ALTER USER yong2 identified by inspur123;ALTER USER yong2 account UNLOCK;--Give user yong2 permission

--Create a folder where the path is the alter log pathCreate or ReplaceDirectory Data_dir as'/u01/app/oracle/diag/rdbms/orcl/orcl/trace';--Create an external tableCreate TableAlert_log (Text_linevarchar2(225)) organization external (TYPE Oracle_loaderDEFAULTDIRECTORY data_dir ACCESS PARAMETERS (RECORDS delimited byNEWLINE Fields) Location ('Alert_orcl.log' ));--Querying database startup time SQLSelectTo_char (Last_time)shutdown, To_char (start_t

MySQL alter summary (reprint)1: Delete ColumnsALTER table "table name" DROP "column name"2: Add columnsALTER table "table name" ADD "column name" INT not NULL COMMENT ' comment description '3: Modify the column type informationALTER table "table name" Change "column Name" "New column name (you can use the same name as the original column)" BIGINT not NULL COMMENT ' comment description '4: Renaming columnsALTER table "table name" Change "column Name" "

Create a table as defined as the target table; Add constraint to the table to ensure that the data in the table is in the target partition; Alter table source table switch to target table partition partition code Where the partition number can be obtained by $partition.partion_func (column value) This process is much faster than insert select because it does not involve IO, it only needs to modify the metadata, the side of the partition Onwer. Howev

MySQL's alter statement usage summary1: Delete ColumnsALTER table "table name" DROP "column name"2: Add columnsALTER table "table name" ADD "column name" INT not NULL COMMENT ' comment description 'altertable tableName addnewColumn varchar(8) comment ‘新添加的字段‘3: Modify the column type informationALTER table "table name" Change "column Name" "New column name (you can use the same name as the original column)" BIGINT not NULL COMMENT ' comment descriptio

In the previous article "mysql--when mysqldump--single-transaction encountered alter TABLE" Test found that in the MySQL 5.6 version, if the table was modified during mysqldump, may result in mysqldump error, This conclusion is inconsistent with colleagues ' execution, so it is tested in MySQL version 5.5.Test environment:MySQL 5.5.14There are table tb1001 under Database TESTDB01, and there are two data in the current table:##=========================

previously added library. Note the changes are turned off and changed back to the read-only property.Note: The emulation library path set in the 1th step must be in the Modelsim installation directory in order for the business to be able to this relative path.Altera_primitives = $MODEL _tech/. /altera/altera_primitives220model = $MODEL _tech/. /altera/220modelALTERA_MF = $MODEL _tech/. /altera/altera_mf5. Add altera underlying hardware primitive emulation library (ATOM)In time-series simulation

// Set the field in the existing table to auto_increment.Alter table tablename change ID int (2) not null auto_increment; // Add a field and set the primary keyAlter table tabelname add new_field_id int (5) unsigned default 0 not null auto_increment, add primary key (new_field_id ); // Index with the primary keywordAlter table tablename add primary key (ID ); // Add a field:Alter table table_name add field_name field_type; // Delete a fieldAlter table table_name drop field_name; // Rename a colu

I found a problem when I was studying the database today. The prompt is as follows:The alter table statement conflicts with the foreign key constraint "fk_student_parents_id_parents_id. This conflict occurs in the Database "school", table "DBO. Parents", column 'id '.I still need to paste my two tables into a graph:This is the parents table:This is the student table:The statement for creating a foreign key is as follows:Use school The problem lies in

We have explained the first three methods of string deformation. Now we are talking about the last method. The method is similar to the method of overwriting, but it is slightly different from the overwrite method. It is not directly covered by another definition, but can be overwritten by modifying the position and length of the original string. The following methods are involved: Replacecharactersinrange:It means to modify the original string through the position and length returned by

Using shell scripts to monitor and manage Oracle databases will greatly simplify DBA workload, such as common instance monitoring, monitoring, and alarm log monitoring, and database backup, AWR report automatic mail, etc. This section describes how to use the shell script to monitor the Oracle alarm log (Monitor alter Log File) in Linux ). Linux Shell:Linux/Unix shell scripts call SQL and RMAN scriptsPassing variables between Linux/Unix shell SQL stat